Find the voltage ratio, Electrical Engineering

Q. (a) Two amplifiers, which can be represented by the model of Figure of the text, are connected in cascade (that is, head to tail), as shown in Figure. Let their parameters be Ri1, Ro1, A1, and Ri2, Ro2, A2, respectively. Find vx /v1.

(b) Discuss how the answer is influenced by the ratio Ri2/Ro1, particularly when this ratio approaches zero or infinity.